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Prothena Corp Public (PRTA) Shares Outstanding (Diluted Average) (2019 - 2025)

Prothena Corp Public has reported Shares Outstanding (Diluted Average) over the past 10 years, most recently at $53.8 million for Q4 2025.

  • Quarterly results put Shares Outstanding (Diluted Average) at $53.8 million for Q4 2025, changed 0.11% from a year ago — trailing twelve months through Dec 2025 was $53.8 million (changed 0.11% YoY), and the annual figure for FY2025 was $53.8 million, changed 0.11%.
  • Shares Outstanding (Diluted Average) for Q4 2025 was $53.8 million at Prothena Corp Public, roughly flat from $53.8 million in the prior quarter.
  • Over the last five years, Shares Outstanding (Diluted Average) for PRTA hit a ceiling of $55.0 million in Q2 2024 and a floor of $40.2 million in Q1 2021.
  • Median Shares Outstanding (Diluted Average) over the past 5 years was $52.9 million (2023), compared with a mean of $50.7 million.
  • Biggest five-year swings in Shares Outstanding (Diluted Average): rose 28.29% in 2021 and later decreased 8.24% in 2022.
  • Prothena Corp Public's Shares Outstanding (Diluted Average) stood at $48.5 million in 2021, then decreased by 2.26% to $47.4 million in 2022, then grew by 12.34% to $53.2 million in 2023, then increased by 1.04% to $53.8 million in 2024, then increased by 0.11% to $53.8 million in 2025.
  • The last three reported values for Shares Outstanding (Diluted Average) were $53.8 million (Q4 2025), $53.8 million (Q3 2025), and $53.8 million (Q2 2025) per Business Quant data.